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authorCurt Brune <curt@cumulusnetworks.com>2013-08-08 12:11:03 -0700
committerGuenter Roeck <linux@roeck-us.net>2013-08-08 12:43:07 -0700
commit93d783bcca69bfacc8dc739d8a050498402587b5 (patch)
tree97c42976e05ecb05f94738cd8a8ae4ff2d25cf7b
parentc095ba7224d8edc71dcef0d655911399a8bd4a3f (diff)
hwmon: (adt7470) Fix incorrect return code check
In adt7470_write_word_data(), which writes two bytes using i2c_smbus_write_byte_data(), the return codes are incorrectly AND-ed together when they should be OR-ed together. The return code of i2c_smbus_write_byte_data() is zero for success. The upshot is only the first byte was ever written to the hardware. The 2nd byte was never written out. I noticed that trying to set the fan speed limits was not working correctly on my system. Setting the fan speed limits is the only code that uses adt7470_write_word_data(). After making the change the limit settings work and the alarms work also. Signed-off-by: Curt Brune <curt@cumulusnetworks.com> Cc: stable@vger.kernel.org Signed-off-by: Guenter Roeck <linux@roeck-us.net>
-rw-r--r--drivers/hwmon/adt7470.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hwmon/adt7470.c b/drivers/hwmon/adt7470.c
index 0f34bca9f5e5..6099f50b28aa 100644
--- a/drivers/hwmon/adt7470.c
+++ b/drivers/hwmon/adt7470.c
@@ -215,7 +215,7 @@ static inline int adt7470_write_word_data(struct i2c_client *client, u8 reg,
u16 value)
{
return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
- && i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
+ || i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
}
static void adt7470_init_client(struct i2c_client *client)